Tool Steel Balls for Rock Bits – S-2 Impact‑Resistant for Harsh Drilling

Product Overview

Specifically, JSW supplies tool steel balls for rock bits manufactured from S-2 shock‑resisting tool steel (AISI S-2 / UNS T41902). Our tool steel balls for rock bits are used as locking mechanisms and wear components in tricone drill bits for oil, gas, and mining operations. These tool steel balls for rock bits exhibit a through‑hardened structure after quenching and tempering, achieving a uniform hardness of HRC 58–62. The combination of high hardness and exceptional toughness enables the balls to withstand heavy impact, extreme vibration, and abrasive mud slurries encountered in offshore and onshore drilling. For more about our company, please visit our about us page.

Key Technical Specifications

Below are the key parameters that define the performance of our tool steel balls for rock bits:

• Material: AISI S-2 tool steel (shock‑resisting grade), also known as S‑2 Rockbit Steel
• Hardness: HRC 58–62 (through‑hardened)
• Diameter Range: 2 mm to 150 mm (custom diameters available)
• Precision Grade: G10 to G1000 (ISO 3290 compliant)
• Roundness: ≤0.05 µm (G10 grade)
• Surface Roughness (Ra): ≤0.01 µm (G10 grade)
• Tensile Strength: Approx. 310,000 psi (2,140 MPa)
• Yield Strength: Approx. 290,000 psi (2,000 MPa)
• Elongation: 7% (in 2 inches)

For detailed product drawings and material certificates, please contact our technical team.